EnergyU.S. edition
US diesel averaged 5.426 dollars per gallon in September 2026, up from 5.134 in August
The US average diesel price rose by 0.29 dollars per gallon from August to September 2026, reaching 5.426 dollars per gallon.
- 2026-085.134
- 2026-095.426
What the September figure shows
If you fill a diesel tank in the United States, the average price in September 2026 was 5.426 dollars per gallon. This is a national average, not the price at any single station.
Sources for this paragraph (1)
- F1 U.S. · Diesel price · 5.426 $/gal · 2026-09 · U.S. Bureau of Labor Statistics
The figure is a level in dollars per gallon. It is not a percentage change.
Sources for this paragraph (1)
- F1 U.S. · Diesel price · 5.426 $/gal · 2026-09 · U.S. Bureau of Labor Statistics
Month by month
August 2026: the average diesel price was 5.134 dollars per gallon.
Sources for this paragraph (1)
- F2 U.S. · Diesel price · 5.134 $/gal · 2026-08 · U.S. Bureau of Labor Statistics
September 2026: the average rose to 5.426 dollars per gallon.
Sources for this paragraph (1)
- F1 U.S. · Diesel price · 5.426 $/gal · 2026-09 · U.S. Bureau of Labor Statistics
The change from the previous month was 0.29 dollars per gallon. This compares September with August, not with September a year earlier.
Sources for this paragraph (3)
- F3 Change from previous period · 0.29 $/gal · 2026-09 · U.S. Bureau of Labor Statistics
- F1 U.S. · Diesel price · 5.426 $/gal · 2026-09 · U.S. Bureau of Labor Statistics
- F2 U.S. · Diesel price · 5.134 $/gal · 2026-08 · U.S. Bureau of Labor Statistics
How September compares with August
The September average was higher than the August average. Both figures come from the same diesel price series, so they can be compared directly.
Sources for this paragraph (2)
- F1 U.S. · Diesel price · 5.426 $/gal · 2026-09 · U.S. Bureau of Labor Statistics
- F2 U.S. · Diesel price · 5.134 $/gal · 2026-08 · U.S. Bureau of Labor Statistics
The facts here include only these two months of diesel prices. They do not show the diesel price a year earlier, so a 12-month comparison for diesel is not possible from this data.
Sources for this paragraph (2)
- F1 U.S. · Diesel price · 5.426 $/gal · 2026-09 · U.S. Bureau of Labor Statistics
- F2 U.S. · Diesel price · 5.134 $/gal · 2026-08 · U.S. Bureau of Labor Statistics
What it means for people in the United States
Anyone who buys diesel paid, on average, 0.29 dollars more per gallon in September 2026 than in August. The national average stood at 5.426 dollars per gallon.
Sources for this paragraph (2)
- F3 Change from previous period · 0.29 $/gal · 2026-09 · U.S. Bureau of Labor Statistics
- F1 U.S. · Diesel price · 5.426 $/gal · 2026-09 · U.S. Bureau of Labor Statistics
The data does not show how this change affects other prices or household budgets. It measures only the average pump price of diesel.
Sources for this paragraph (1)
- F1 U.S. · Diesel price · 5.426 $/gal · 2026-09 · U.S. Bureau of Labor Statistics
What the data does not tell us
The figures are national averages. They do not show differences between states or regions.
Sources for this paragraph (2)
- F1 U.S. · Diesel price · 5.426 $/gal · 2026-09 · U.S. Bureau of Labor Statistics
- F2 U.S. · Diesel price · 5.134 $/gal · 2026-08 · U.S. Bureau of Labor Statistics
Two monthly readings are not enough to establish a trend. The data also does not explain why the price rose.
Sources for this paragraph (3)
- F1 U.S. · Diesel price · 5.426 $/gal · 2026-09 · U.S. Bureau of Labor Statistics
- F2 U.S. · Diesel price · 5.134 $/gal · 2026-08 · U.S. Bureau of Labor Statistics
- F3 Change from previous period · 0.29 $/gal · 2026-09 · U.S. Bureau of Labor Statistics
Other price series published for September 2026, such as gasoline or consumer price inflation, use different units and definitions. They are not directly comparable with the diesel average in dollars per gallon.
Sources for this paragraph (2)
- C128 U.S. · Gasoline price (regular) · 4.48 $/gal · 2026-09 · U.S. Bureau of Labor Statistics
- C121 U.S. · Consumer price inflation · 3.7% · 2026-09 · U.S. Bureau of Labor Statistics
AI analyst view
Little change expected low confidence next two monthly releases
Estimate range: 5.134–5.426 USD/gal
Why
- A single-month rise of 0.29 dollars per gallon is large for a national average. After moves this size, pump prices often settle or give back part of the gain rather than keep climbing at the same pace. F3 F1
- Diesel and heating oil are closely related products, and demand for heating fuel tends to pick up in the fall and winter. That seasonal pull usually limits how far diesel falls in the cooler months, which argues against a sharp drop below the August level. F2
- A separate CPI series for motor fuel, measured differently from the dollars-per-gallon average, was 34.2% above a year earlier in September 2026. That points to fuel prices that are already high relative to last year, which in my reading leaves less room for further steep gains. C129
What would change this view
- If the October diesel average rises above 5.426 dollars per gallon by another move as large as 0.29, I would shift to an upward view.
- If the October average drops below the August level of 5.134 dollars per gallon, I would shift to a downward view.
This is the AI’s own interpretation of the official figures above, not an official forecast. It may turn out wrong.
Scenarios to watch
- Scenario, not a forecast If the next monthly reading shows another increase, the September level would mark a step in a rising run rather than a one-month move.
- Scenario, not a forecast If the next reading falls back toward the August level, the September rise would look more like a short-lived jump.
What to check next
- The October 2026 US average diesel price, compared with the September level of 5.426 dollars per gallon
- Whether the next month-on-month change is larger or smaller than 0.29 dollars per gallon
- The next release of the CPI motor fuel series, read as its own 12-month change rather than against the diesel average
Verified data used in this report
| Indicator | Value | Period | Sources | Accessed | |
|---|---|---|---|---|---|
| F1 | U.S. · Diesel price | 5.426 $/gal | 2026-09 | U.S. Bureau of Labor Statistics | |
| F2 | U.S. · Diesel price | 5.134 $/gal | 2026-08 | U.S. Bureau of Labor Statistics | |
| F3 | Change from previous period | 0.29 $/gal | 2026-09 | U.S. Bureau of Labor Statistics | |
| C114 | U.S. · GDP growth | 2.16% | 2025 | World Bank | |
| C115 | U.S. · House prices | 2.1% | 2026-Q2 | OECD | |
| C116 | U.S. · Unemployment rate | 4.2% | 2025 | World Bank | |
| C117 | U.S. · Fertility rate | 1.63 | 2024 | World Bank | |
| C118 | U.S. · Share of population aged 65+ | 18.39% | 2025 | World Bank | |
| C119 | U.S. · Population growth | 0.52% | 2025 | World Bank | |
| C120 | United States consumer price index (CPI-U, 1982-84=100) | 336.94 | 2026-09 | U.S. Bureau of Labor Statistics | |
| C121 | U.S. · Consumer price inflation | 3.7% | 2026-09 | U.S. Bureau of Labor Statistics | |
| C123 | U.S. · Electricity price per kWh | 0.2 $/kWh | 2026-09 | U.S. Bureau of Labor Statistics | |
| C124 | U.S. · Electricity price inflation | 4.4% | 2026-09 | U.S. Bureau of Labor Statistics | |
| C125 | U.S. · Energy price inflation | 20.4% | 2026-09 | U.S. Bureau of Labor Statistics | |
| C126 | U.S. · Food price inflation | 1.8% | 2026-09 | U.S. Bureau of Labor Statistics | |
| C127 | U.S. · Gas price inflation | 5% | 2026-09 | U.S. Bureau of Labor Statistics | |
| C128 | U.S. · Gasoline price (regular) | 4.48 $/gal | 2026-09 | U.S. Bureau of Labor Statistics | |
| C129 | U.S. · Fuel price inflation | 34.2% | 2026-09 | U.S. Bureau of Labor Statistics | |
| C130 | U.S. · Utility gas price | 1.7 $/therm | 2026-09 | U.S. Bureau of Labor Statistics | |
| C131 | U.S. · Rent inflation | 2.8% | 2026-09 | U.S. Bureau of Labor Statistics | |
| C132 | U.S. · Housing cost inflation | 3.2% | 2026-09 | U.S. Bureau of Labor Statistics | |
| C133 | U.S. · Unemployment rate | 4.2% | 2026-09 | U.S. Bureau of Labor Statistics | |
| C134 | U.S. · Wage growth | 3% | 2026-09 | U.S. Bureau of Labor Statistics |
Sources
How this report was checked
- Data: the newest reference period cited is 2026-Q2.
- Figures were collected from the source on
- Written by an AI model (claude-opus-5-5) using only the official figures listed in this report.
- Automatic checks passed: every number matches a cited figure, every paragraph names its evidence, and there is no investment advice or copied source text.
- A separate quality-check model raised concerns, and the report was rewritten once to address them.
- No person reviewed this report before publication. Automatic checks confirm the numbers, not every interpretation.
The source has since revised figures cited here (as collected → current):
- United States average price of electricity (dollars per kWh) · 2026-09: 0.2 $/kWh → 0.196 $/kWh
- United States average price of regular gasoline (dollars per gallon) · 2026-09: 4.48 $/gal → 4.482 $/gal
Update history
- 2026-11-03 08:30 UTC — created
- 2026-11-03 08:30 UTC — approved+published
This analysis was written by AI from official statistics and passed automated checks. Last checked: 2026-11-03